Extension-table slide



S. GAL ERKINJ EXTENSION TABLESLIDE. APPLICATION YFILED MAY26.1919.

Patented Nov. 8, 1921.

' wlth extension tables.

UNITED STATES PATENT OFF-ICE.

SAMUEL GALERKIN, OF MILWAUKEE, WISCONSIN.

EXTENSION-TABLE SLIDE.

Specification of Letters latent.

To all whom it may concern:

Be it known that I, SAMUEL GALERKIN, a citizen of Russia, residing at Milwaukee, in the county of Milwaukee and State of Visconsin, have invented certain new and useful Improvements in Extension-Table Slides, of which the following is a specification, reference being had to the accompanying drawing, forming a part thereof.

his invention relates more particularly provided with equalizing devices, whereby movement of either end section of a table outward or inward, causes simultaneous and equal movement of the other end section'in the opposite direction.

The main objects of the present invention are to increase the extensibility of the slides and hence of the tables to which they are applied without correspondingly increasing the length of the slide bars, in connection firm and stablesupport for both ends of a table when extended, particularly a table having a'central leg or pedestal; to facilitate opening or extending and closing or contracting such tables; and

generally to improve the construction and operation .of

It consists in the construction, arrange- 'ment and combination of parts ashereinafter particularly in-theclaims. 1 I V In the accompanying drawing like characters designate the same parts in the several described and pointed out figures.

Figure 1 is an inverted plan view. of a closed extension table top provlded with slides embodying the inventlon, and having a central pedestal or shown in cross section, or crosspiece of the pedestal being broken away to disclose the superposed slide; Fig. 2 is a fragmentary view of thetable showone end of the cap ing one of the slides partially extended; 'Fig. 3 is an enlarged central cross section on the line '3-3,

v Fig. 1, of one of the slides; and Figs; 4 and 5 are detail views of a portion of a slide bar and a flanged roller'for connecting it with an adjoining bar, Fig. 4 being a sideelevation, parts being broken and rotatably mountedon the support which is Patented Nov. 8, 1921. 1919. Serial No. 299,932.

e present case two, floating or relatively movable intermediate bars 3. The -middle bars 1 are mounted on and fastened parallel witheach other tions 3 are provided in recesses in the under sides thereof, with oppositely and inwardly facing parallel longitudinal racks 10, extending from the middle portions of the bars to or toward their oppositeends. In a corresponding recess inthe under side of each middle bar 1, is rotatably mounted a gear or pinion l1, meshing on opposite sides with the racks 10 of the adjoining intermediate bars 3.

'Each middle bar 1 is provided with two oppositely or outwardly facing parallel longitudinal racks 14:, extending from the middle portion thereof'to or toward its ends, and the end or outsidefbars 2"are provided with oppositely or inwardly facing parallel plane with the racks 14, and extending from the middleportions of the bars to or toward opposite ends thereof. Gears or pinions 17, of the same size and having the same numas the gears 11, are centrally intermediate ber of teeth floating on opposite are 3, each meshing sides thereof with oneof the racks 14 of the associated middle bar 1, and with the rack 15 of the adjoining end or outside bar 2.

As shown in Fig. 3, the racks 10 and gear "11 of-each slide set in recesses in the bars 1 and 3, are in'a plane above and parallel with the plane of the racks 14 and 15 and gear 17, set in shallower recesses in the bars 1, 2 and 3. The'several gears may be rotatably connected with the bars on which they are mounted by round or oval headed Wood screws 20, and the racks with which the gears mesh may be fastened to the bars by countersunk flat headed wood screws 21, as indicated by dotted lines in Fig. 3. The rethe racks. from engagement cess in which the gear 11 of each middle bar is mounted may be bridged by a metal plate 2e, fastened at the ends to the bar so as toconfine the gear in place in case its pivot screw becomes loose.

Tlie several bars of each slide may be connected with and supported and guided on one another by the usual or any suitable means.

as shown in Figs. 3, 4 and 5, the bars are formed in their registering longitudinal T-grooves, and each bar is provided adjacent one end thereof, with a block 26, fitted and fastened in its T-groove and projecting therefrom into the groove of the adjoining bar.

In a recess formed in the protruding portion or tongue of each block 26, is rotatably mounted on a pin orscrew 27, a flanged roller 28. The flange of the roller working in the wider part of the groove in the adj oining bar, holds the adjoining bars together face to face, and the periphery of the roller extending above and below the tongue or protruding portion of'the block 26, facilitates the operation of the slides, each bar being connected with an adjoining bar by two rollers which carry the load to which the bars are subjected. a

Each outside bar 2, is formed or provided on the upper side of the end which is attached to a table top section, with a raised seat or shim 30., as shown in Fig. 3, to prevent the relatively movable bars associated therewith from binding against the top sections of the table when it is being extended or closed. .In like manner, the middle bars 1 are formedor provided on the under side with bearings or shims. 31, which extend belowthe lower sides of theassociated floating bars and bear on the upper side of the cap. or cross piece 4 of the pedestal, so as to prevent the floating bars from rubbing and binding against the cap or cross piece when the table is extended or closed.

.The blocks 26 serve as stops to limit the outward movement of the bars in extending the slides, and prevent the withdrawal of with the gears with which they cooperate. The inward or closing movement ofthe bars is limited by the engagement, of stop pins 33, which are inserted in and project laterally from all but one ofthe bars, as shown in Fig. 2, and

engagewith notches in the ends of adjoinin g bars, as indicated by dotted lines in Fig. 1, when the ends of the several bars are brought into alinement with one another brought together. s

In the operation of the slides, when either top section'6 or 7 of the table is drawnout or pushed in, the other section will be moved simultaneously to the same extent by the interaction of the gears and racks, the gears is enabled to easily adjoining faces with sections 6 and .the adjoining outer and the top sections 6 and of the table are 11 engaging with the racks 10 compelling like and simultaneous movement of the bars 3 in opposite directions, and the gears 17 moving with the bars 3 in engagement with the racks 1e and'15 compelling like and simultaneous movement in opposite directionsof the bars 2, relative to the bars 3, so'that a person at either end of the table open or extend and to close or contract the table, without aid.

By the employment of five or'more bars in each slide, connected with one another as hereinbefore described, a greater degree of extension is obtained, and when the slides are drawn out to the limit of their extension,

they overlap one another, and the rollers 28 1 between adjoining bars are separated .suficiently to prevent the floatingbars from sagging; at the ends of. the slides and to afford a firm, stable support for the, top

7 of thetable. V

Various modifications in the details of construction and arrangement of parts of the slides may be made without departure from the principle and scope ofthe invention as definedin the following claims.

I claim: I r

1. In an extension table the combination of a relatively fixed middle bar, floating end bars and floating intermediate bars slidably connected with one another side by. side, tWo oppositely facing longitudinal racks fixed on the middle bar and extending in opposite directions from r the central port on thereof, longitudinal racks mounted on the intermediate and end bars, a gear mounted on the middle bar and meshing onopposite sides with racks on intermediatebars, and a gear mounted on each intermediate bar next ,to the middle-bar and meshing on opositesides with racks on the middle bar and the next outer bar. V .7

2. In an extension table slide the combination of a relatively fixed middle bar provided with two oppositely facing longitudinal racks,oppositely movable end mediate bars slidably connected with one another and with-the middle, bar on opposite sides thereof and each provided with a lon gitudinal rack, a gear mounted on the middle and inter- 1 racks on adjoining intermediate bars, and

gears mounted'onzthe intermediate bars adj oining the middle arallel with that a rack on bar ina' plane below and of the gear on'the middle the middle bar and thevrack on bar. V I 3. In an extension table slide the combination of arelatively stationary middle bar opposite sides of.the"-middle baIVfiDC l. with oneanother and each providedwitha longiand each meshing on opposite sides with provided with oppositely facing. longitudi- I tudinal rack, a gear mounted on the middle bar and meshing on opposite sides With the racks of adjoining intermediate bars, and gears mounted on the intermediate bars next to the middle bar and meshing with the racks of the middle bar and the racks of adjoining outer bars, the gear on the middle bar and the racks of the intermediate bars meshing therewith being let into recesses in the under sides of said bars and located in a plane above and the gears on the adjoining intermediate bars and of the racks meshing therewith.

at. The combination with a table comprising a central support and separable top sections, of two slides each comprising a middle bar fixed to said support and provided with two oppositely facing racks, two outside parallel with the plane of bars fixed to the top sections of the table and intermediate floating bars provided with racks and slidably connected with the middle and outside bars, a gear mounted on each middle bar and meshing on opposite sides with the racks of adjoining floating bars, and gears mounted on intermediate floating bars and meshing on opposite sides with the racks of the middle bars and of adjoining outer bars, the gear of the middle bar and the racks with which it meshes being let into recesses in the under sides of the middle and intermediate bars and located in a plane above and parallel with the plane of the other gears and racks.

In witness whereof I hereto afiix my signature.

SAMUEL GALERKIN. 

